.btn1{background-color: blue;color: #fff; border: none; padding: 5px 20px;
border-radius: 14px;}
#div1{width: 0px; height: 0px;background-color: transparent;
border-top:10px solid black;
border-right:10px solid transparent;border-bottom:10px solid black;
border-left:10px solid transparent;}/*transparent透明*/
#div2{width: 1px; height: 1px; background-color: orange;
 border-radius: 50%;
border: 10px solid black;border-top:10px solid black;
border-right:10px solid transparent;border-bottom:10px solid black;
border-left:10px solid transparent; }
#div3{width: 1px; height: 1px; background-color: white; 
		border-radius: 50%;
		border: 15px solid blue;border-top:15px solid transparent;
		border-right:15px solid blue;border-bottom:15px solid transparent;
		border-left:15px solid blue;
		-webkit-transform: rotate(40deg); }
		#div4{height: 45px;width: 45px;border-radius: 50% ;background-color: #000000;
	padding-left: 14px;padding-top:13px ;padding-bottom: 1px;border: #FFFFFF solid 2px;}

